"FORE!!"
Acetone has so many uses.
One of them is to clean the barrel of urethane foam guns. See, once you attach a can of foam to the gun, you can't remove the can without ruining the gun unless you A) attach another can of foam immediately, or B) attach a "cleaning" can, and spray it until all traces of foam are purged from the device. The "cleaning" can is nothing more than a pressurized can of acetone. And when you are purging the foam from the gun, it tends to create a spray of atomized acetone in a cloud which I would conservatively estimate to be about 15 feet long and 5 feet in diameter. The instructions on the can contain the words "OUT DOORS" in many places.
Now, word to the wise: If you even have an inkling to aim such a device at an open flame, I suggest you do not do so inside your boss' 20-foot tool trailer, but if you do, make sure he is the kind of boss who has a sense of humor about seeing the back doors of said trailer blow open as a slightly-less-hairy and slightly-more-stinky employee falls backwards out of it.
Ahhhh... that reminds me of my college days.
We replaced the furniture in our house. This left a 70's MASSIVE chair sitting on our front porch. My housemates decide it must be sacrificed in our bonfire ring. (We lived out in the country about a mile from college.)
My one housemate goes and fills one of those 3 gallon containers of gas. He then proceeds to douse the chair in the ENTIRE CONTAINER full of gas.
He lights a piece of paper and sets it upon the chairs seat cushion and runs to a safe distance (where I am standing).
After about 10-15 seconds of nothing happening, he turns to me and says, "Hey, would you go move that paper so the chair will actually catch?"
My response involved something about hell freezing over. So, he goes to move the paper.
As he gets to the chair and is bending down, what he now describes as a massive rumble begins. He has enough time to spin AWAY from the chair and approximate the fetal position while standing up. As I watch, the ensuing fireball engulfs him and extends ALMOST all the way to where I was standing.
Needless to say, I was a little worried.
FORTUNATELY, all that happened was he went sans leg and arm hair for a few months. AND I got a nice illustration about patience... and fire safety... and a cool explosion.